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    <title>Fixed top navbar example for Bootstrap</title>

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    <!-- Custom styles for this template -->
    <link href="navbar-top-fixed.css" tppabs="http://wiki.jikexueyuan.com/project/bootstrap4/examples/navbar-top-fixed/navbar-top-fixed.css" rel="stylesheet">
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  <body>

    <div class="pos-f-t">
      <div class="collapse" id="navbar-header">
        <div class="container-fluid inverse p-a">
          <h3>Collapsed content</h3>
          <p>Toggleable via the navbar brand.</p>
        </div>
      </div>
      <div class="navbar navbar-default navbar-static-top">
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbar-header">
          &#9776;
        </button>
      </div>
    </div>

    <div class="container">
      <div class="jumbotron">
        <h1>Navbar example</h1>
        <p class="lead">This example is a quick exercise to illustrate how fixed to top navbar works. As you scroll, it will remain fixed to the top of your browser's viewport.</p>
        <a class="btn btn-lg btn-primary" href="../../components/index.htm#navbar" tppabs="http://wiki.jikexueyuan.com/project/bootstrap4/components/#navbar" role="button">View navbar docs &raquo;</a>
      </div>
    </div>


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